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http://dx.doi.org/10.6110/KJACR.2015.27.5.277

An Experimental Study of the Effect of Regeneration Area Ratio on the Performance of Small-Sized Dehumidification Rotor for Residential Usage  

Kim, Nae-Hyun (Division of Mechanical System Engineering)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.27, no.5, 2015 , pp. 277-282 More about this Journal
Abstract
During hot and humid weather, air-conditioners consume a large amount of electricity due to the large amount of latent heat. Simultaneous usage of a dehumidifier may reduce latent heat and reduce electricity consumption. In this study, dehumidification performance was measured for a small-sized dehumidification rotor made of inorganic fiber impregnated with metallic silicate within a constant temperature and humidity chamber. Regeneration to dehumidification depends on ratio, rotor speed, room temperature, regeneration temperature, room relative humidity and frontal velocity to the rotor. Results demonstrate an optimum area ratio (1/2), rotor speed (1.0 rpm), and regeneration temperature ($100^{\circ}C$) to achieve a dehumidification rate of 0.0581 kg/s. As the area ratio increases, the optimum rotation speed and the optimum regeneration temperature also increase. Above the optimum rotor speed, incomplete regeneration reduces dehumidification. Above the optimum regeneration temperature, increased temperature variation between regeneration and dehumidification reduces dehumidification. Dehumidification rate also increases with an increase of relative humidity, dehumidification temperature and flow velocity into the rotor.
Keywords
Dehumidification; Regeneration; Rotor; Area ratio; Performance;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 Wurm, J., Kosar, D., and Clement, T., 2002, Solid desiccant technology review, Bulletin of IIR, No. 2002-3, pp. 774-781.
2 Pesaran, A. A., Penny T. R., and Czandena, A. W., 1992, Desiccant cooling:state-of-the-art assessment, NREL Report(NREL-TP254-4147).
3 Yu, P. C. H. and Chow, W. K., 2007, A discussion on potentials of saving energy use for commercial buildings in Hong Kong, Energy, Vol. 32, pp. 83-94.   DOI
4 Niu, J. L. and Zhang, L. Z., 2002, Effects of wall thickness on the moisture and heat transfer in desiccant wheels for air dehumidification and enthalpy recovery, Int. Comm. Heat Mass Trans., Vol. 29, pp. 255-268.   DOI
5 Charoensupaya, D. and Worek, W. M., 1988, Parametric study of an open-cycle adiabatic solid desiccant cooling system, Energy, Vol. 13, pp. 739-747.   DOI
6 Zheng, W. and Worek, W. M., 1993, Numerical simulation of combined heat and mass transfer process in a rotary dehumidifier, Numerical Heat Transfer, Part A, Vol. 23, pp. 211-232.   DOI
7 Dai, Y. J., Wang, R. Z., and Zhang, H. F., 2001, Parametric analysis to improve rotary desiccant dehumidification using a mathematical model, Int. J. Thermal Sci., Vol. 40, pp. 404-408.
8 Zhang, L. Z. and Niu, J. L., 2002, Performance comparisons of desiccant wheels for air dehumidification and enthalpy recovery, Applied Thermal Eng., Vol. 22, pp. 1347-1367.   DOI
9 Zhang, X. J., Dai, Y. J., and Wang, R. Z., 2003, A simulation of heat and mass transfer in a honeycombed rotary desiccant dehumidifier, Applied Thermal Eng., Vol. 23, pp. 989-1003.   DOI
10 Collier, R. K. and Cohen, B. M., 1991, An analytical examination of method for improving the performance of desiccant cooling system, J. Solar Energy Eng., Vol. 113, pp. 157-163.   DOI
11 Zheng, W., Worek, W. M., and Novosel, D., 1995, Performance optimization of rotary dehumidifier, Trans. ASME, J. Heat Transfer, Vol. 117, pp. 40-44.   DOI
12 ASHRAE Standard 41.2, 1986, Standard Method for Laboratory Air-Flow Measurement, ASHRAE.
13 ASHRAE Standard 41.1, 1986, Standard Method for Temperature Measurement, ASHRAE.
14 Chung, J. D., Lee, D.-Y., and Youn, S. M., 2007, Optimization of the area ratio of regeneration to dehumidification and rotor speed on the condition of low regeneration temperature, Korean J. Air-Conditioning and Refrigeration, Vol. 19, No. 7, pp. 521-528.
15 Klein, S. J. and McClintock, F. A., 1953, The description of uncertainties in a single sample experiments, Mech. Eng., Vol. 75, pp. 3-9.
16 Kodama, A., Hirayama, T., Goto, M., Hirose T., and Cristoph, R. E., 2001, The use of psychrometric charts for the optimization of a thermal swing desiccant wheel, Applied Thermal Eng., pp. 1657-1674.
17 Lee, D.-Y. and Song, G.-E., 2009, Theoretical derivation of the optimum rotation speed of a desiccant rotor, Korean J. Air-Conditioning and Refrigeration, Vol. 21, No. 10, pp. 575-583.